Python 3.x OPENCV自动裁剪视频

我尝试使用opencv界面在手机上播放垂直视频中拍摄的视频，无论我尝试做什么，视频总是会失真，要么被剪切，要么使用全屏模式挤压

如何让它以本机分辨率播放视频

# importing libraries
import cv2
import numpy as np
window_name = "window"
# Create a VideoCapture object and read from input file
cap = cv2.VideoCapture(r"examples\test2_stand.mp4")
cv2.namedWindow('mp4', cv2.WINDOW_AUTOSIZE)
# Check if camera opened successfully
if (cap.isOpened()== False):
  print("Error opening video  file")

# Read until video is completed
while(cap.isOpened()):

  # Capture frame-by-frame
  ret, frame = cap.read()
  if ret == True:

    # Display the resulting frame
    cv2.imshow("mp4", frame)

    # Press Q on keyboard to  exit
    if cv2.waitKey(25) & 0xFF == ord('q'):
      break

  # Break the loop
  else:
    break

# When everything done, release
# the video capture object
cap.release()

# Closes all the frames
cv2.destroyAllWindows()